Lowi, T. J., Ginsberg, B., & Shepsle, K. A. (2002). American government: Power and purpose (7th ed.). Norton.
Lua i Stíl Chicago (17ú heag.)Lowi, Theodore J., Benjamin Ginsberg, agus Kenneth A. Shepsle. American Government: Power and Purpose. 7th ed. New York: Norton, 2002.
Lua MLA (9ú heag.)Lowi, Theodore J., et al. American Government: Power and Purpose. 7th ed. Norton, 2002.
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